import mpl_tookits
#Error
 #No module named 'mpl_tookits'
Luckily, I only need basemap right now
#Basemap Bug Fix
import importlib
mpl_toolkits = importlib.import_module('mpl_toolkits')
from mpl_toolkits.basemap import Basemap
          
This appears to be an oddity of your particular installation, not a general characteristic or a bug.  You could raise this on the matplotlib-users mailing list (after subscribing, if you have not already done so), including information about what your operating environment is and how you installed matplotlib.
          
Hi elfring, thanks for responding.
It seems to be a problem for others as well:

pyinstaller/pyinstaller#848

#3252

http://matplotlib.1069221.n5.nabble.com/ImportError-No-module-named-mpl-toolkits-td43642.html

http://stackoverflow.com/questions/16769899/matplotlib-basemap-no-module-named-axes-grid1

https://borealperspectives.wordpress.com/2013/11/24/91/

https://groups.google.com/a/continuum.io/forum/#!topic/anaconda/KnbWZ5pl0pE

          
A potentially similar problem has cropped up before, as you note, but it is not a current matplotlib bug.  As explained in some of the reports you cite, there was an awkward transition period in the handling of namespace packages, when some mixtures of versions or sequences of installation could cause the problem.  Without more information it is impossible to even speculate on what is causing the present failure on your system--but I'm confident that it is a peculiarity of your installation, hence my recommendation that you raise your question (and add essential information) on the mailing list, where more people will see it and there will be a better chance of someone coming up with a solution.
Can't import mpl_toolkits on Python3. Will need other parts of mpl_toolkits soon.
python3 version is 3.5.1 matplotlib version is 1.5.1
import mpl_tookits
#Error
 #No module named 'mpl_tookits'
Luckily, I only need basemap right now
#Basemap Bug Fix
import importlib
mpl_toolkits = importlib.import_module('mpl_toolkits')
from mpl_toolkits.basemap import Basemap
i faced Error:cannot import name 'Axes3d' from 'mpl_toolkits.mplot3d'

so i immitated your code

import importlib

mpl_toolkits = importlib.import_module('mpl_toolkits')

from mpl_toolkits.mplot3d import Axes3D

so i immitated your code

import importlib

mpl_toolkits = importlib.import_module('mpl_toolkits')

from mpl_toolkits.mplot3d import Axes3D

it works